Update README.md

README.md

@@ -86,4 +86,16 @@ prompt = template.format(**sampled)
 print(prompt)
 ```
 
+---
+
+## 📖 Citation  
+If you use this dataset, please cite:  
+
+```bibtex
+@article{UniEM2025,
+  title={UniEM-3M: A Universal Electron Micrograph Dataset for Microstructural Segmentation and Generation},
+  author={...},
+  journal={...},
+  year={2025}
+}